Refer to the exhibit. Which of these is applied to the Bearer class?()
A.WRED
B.traffic shaping
C.packet marking
D.packet classification
E.FIFO queuing within the class
R1(AS1)------R2(AS2)-----R3(AS2)----R4(AS2) ,R1在AS1,R2,R3,R4在AS2,R1和R2建EBGP , R2和R3 IBGP,R3和R4 IBGP,產(chǎn)生BGP路由從R1傳給R2,問這條路有會不會在R4上出現(xiàn),如果不會,怎么解決.